Smoke-consuming furnace



(NoModeL) SMOKE UONSUMING FURNACE.

Patented Aug. 18, 1885.

.dttorneyS PhoIo-Lilhogmp'mr, Wilhinglun, D a

i 2 Sheets-Sheet 1. O. 0. CARTER.

(No Model.) 2 Sheets-Sheet 2. C. G. CARTER.

SMOKE GONSUMING FURNACE. No. 324,532. Patented Aug. 18, 1885.

Q I Q I N' I m I UNITED STATES PATENT OFFICE.

CHARLES C. CARTEB, OF SAN FRANCISCO, CALIFORNIA.

SM'O'KE-CONSU MING FURNACE.

SPECIFICATION forming part of Letters Patent No. 324,532, dated August 18, 1885.

Application filed May 4, 1885.

To all whom it may concern.-

Be it known that 1, CHARLES C. CARTER, of the city and county of San Francisco, and State of California, have invented an Improvement in SmokeConsuming Furnaces; and I hereby declare the following to be afull, clear, and exact description thereof.

Myinvention relates to that class of smokeconsumingfurnacesinwhichasuction blower or fan is connected with the smoke-stack and with the fire-box or the chamber below the grate, whereby the smoke and other products of combustion are drawn from the stack and forced through the furnace again.

My invention consists in a conical or inverted funnel shaped mouth piece located within the stack, and having a diameter at its base Very little less than the diameter of the stack, said mouthpiece being connected with the suction-blower by a suitable pipe, and provided with ports or apertures controlled by valves or gates, all of which Ishall hereinafter fully explain.

In devices of this class the pipe from the blower which opens into the stack generally stops short with the inner surface of the stack, though in one case it projects into the stack and bends upwardly. The disadvantage of these devices is, thatthey fail to catch enough of the products of combustion to render them perfect. The reason of the failure in the first case is,that the diameter of the stack is generally so great that but a small part of its contents is affected by the suction, and only that portion near the pipe is drawn in, the rest escaping. I

In the second case, where the pipe lies within the stack, it must necessarily be of small diameter, in order to avoid beingan obstruction to the natural draft required in firing up. The consequence is, that the suction affects only such of the products of combustion as lie near the pipe, while most of them pass directly on through the stack.

The object of my invention is to provide the suction-pipe with such a mouthpiece as will nearly fill the stack, thereby catching all the products of combustion, and at the same time so constructing it with valved ports that it will not interfere with the natural draft.

(No model.)

Referring to the accompanying drawings, Figure 1 is an elevation of my mouth-piece, a portion of its wall being broken away to show the back. Fig. 2 isa perspective of a furnace, showing the surroundings and application of the mouth-piece.

A is a furnace of any suitable pattern, and B is its stack,

G is the fan or suction blower, adapted to be driven by suitable power.

D is the pipe extending from the suctioir blower and opening in thechamber under the grate.

E isa supplementary blower, connected with pipe D by pipe 6, whereby air is furnished.

F is the pipe extending from the suctionblower and entering the stack B, being provided with a downwardly-projecting elbow, f. At the lower end of the elbow is the conical or inverted-funnel-shaped mouth-piece G, the diameter of whose base is but little smaller than the diameter of the stack. The mouthpiece is steadied and secured in the stack in any suitable manner, as by the arms 9.

In the sides of the mouth-piece are made apertures or ports H, which are controlled by gates 01' valves h. These may be mounted or seated and operated in any suitable manner. A practical way is, as here shown, to provide them with a top band, h, and a base band, h encircling the corresponding parts of the mouth-piece and adapted to move thereon.

When thus constructed, the gates and bands form practically an outer cone fitted on the inner conical mouth-piece, and provided with apertures which, by the movement of said outer cone, coincide with the ports, to establish a free passage or move to one side to cover the ports with the gates.

I is a rod or stem, by which the gates are operated. This stern projects through an elongated slot, z, in the stack.

The movement of the gates is accurately limited by means of a pin, J, on the base of the mouth-piece, which projects through an .elongatedslot, j, in the base-ring, h

In the open top of elbow f is a damper, K, operated by astem, k, in the usual manner.

The operation of my device is as follows: When the furnace is first fired up, and it is necessary that the stack should be as little obstructed as possible, in order to provide the natural draft, I open the ports H by turning the gates h to one side. This provides a sufficiently-free passage. After the furnace is well started I close the ports H, and the suctionimmediately causes all the products of combustion to enter the mouthpiece, and thence to pass through pipes Fand D into the furnace. In this way I provide for the effect of the suction on all the contents of the stack, and at the same time provide also for a natural draft when required.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a smoke-consuming furnace in which a suction blower or fan is employed to draw the products of combustion from the stack, an inverted-funnel-shaped mouthpiece provided with ports or apertures controlled by valves or gates, said mouthpiece being located in the stack of the furnace and connected with the blower, substantially as herein described.

2. In a smoke-consuming furnace, the in .verted-funnel-shaped mouth piece G in the stack, provided with ports or apertures controlled by Valves or gates, said mouth-piece being connected with a suction blower or fan, substantially as herein described.

3. In a smoke-consuming furnace, the in verted-funnel-shaped mouth-piece G in the stack, having ports or apertures controlled by valves or gates, in combination with the pipe F, connecting-elbow f, suction-blower G, and pipe D, substantially as herein described.

4. In a smoke-consuming furnace in which a suction blower or fan is employed to draw the products of combustion from the stack, the inverted -funnel shaped mouth-piece G, located in the stack, and having a diameter at its base but little less than the diameter of the stack, said mouth-piece being connected with the blower and provided with ports or apertures controlled by valves or gates, substantially as and for the purpose herein described.

5. In a smoke-consuming furnace, the suction-blower C, pipes D and F, and elbow f, entering the stack, in combination with the inverted-funnel-shaped mouthpiece G in the stack and joined to the elbow, said mouth-piece having ports or apertures Hand the swinging valves or gates h, and stem I, by which the ports are opened or closed, substantially as herein described.

In witness whereof I have hereunto set my hand.

CHARLES c. CARTER.

Witnesses:

S. H. Nounsn, H. 0. LEE. 

